Avago Technologies 3ware 9650SE-12ML (Channel) - Manual (Page 303)

Error and Notification Messages
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Cause
The battery pack voltage being monitored by the Battery Backup Unit has
risen above the warning threshold.
Action
The Battery Backup Unit is presently still able to backup the 3ware RAID
controller, but you should replace the battery pack if the warning continues.
0047 Battery voltage is too low
Event Type
Error
Cause
The battery pack voltage being monitored by the Battery Backup Unit is too
low to backup the 3ware RAID controller.
You may see this message during a battery capacity test. In this case, it is not a
sign of battery failure.
You may also see this message if the battery pack is plugged in while the
computer is on. This is not advised.
Action
Replace the battery pack if none of the above causes apply and the warning
continues.
0048 Battery voltage is too high
Event Type
Error
Cause
The battery pack voltage being monitored by the Battery Backup Unit is too
high to backup the 3ware RAID controller.
Action
The battery pack must be replaced.
This may be a fault in the BBU control module. If you get this error, do the
following:
1 Turn off the computer and remove the 3ware RAID controller.